Has anyone heard from Yip?

Good thing you posted this. I have used any number of protractors over the years and the SmarTractor is second to none. It is so much more flexible and accurate. It is wonderful to use even if you are an old guy with bad eyesight. Yes, it is twice as expensive. It is worth 4 times as much. I promise you will never regret spending the money on the SmarTractor.

MintLP $130.
Smartractor $800.  

Same here.  Contacted him well over a month ago.  No reply.

I also have the SmartTractor.  Ir’s expensive, but It’s allowed me to set up my cartridge despite my cataracts and floaters.  It’s still a challenge. The Dr. Feikert tool simply would not work for me because of the black background, which made it difficult to spot the cantilever/stylus.